Offering optional late night Prayer after the first Adhan for the Fajr Prayer

Q 1: You know that it is an act of Sunnah to perform two Adhans (call to Prayer) for Fajr (Dawn) Prayer. Is it permissible to offer Salah (Prayer) after the first Adhan?

A: It is desirable for those who hear the first Adhan of Fajr (Dawn) Prayer to offer supererogatory Salah as much as they can until the time of Fajr becomes due with the emerging of the second true dawn. After the second Adhan of Fajr is performed, there is no Salah to be offered except the two supererogatory Rak'ahs of Fajr (Dawn) Prayer. It is narrated by `Abdullah ibn `Umar (may Allah be pleased with them both) that the Prophet (peace be upon him) said: When dawn sets in, no prayer is valid except the two (supererogatory) Rak`ahs of Fajr. Related by Imam Ahmad in his Musnad, Abu Dawud, Al-Tirmidhy and others. Al-Tirmidhy said: "This is agreed upon by scholars."May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.